From e1c612bf0ac7d912c4fcaa431842acf784c4f467 Mon Sep 17 00:00:00 2001
From: armink <armink.ztl@gmail.com>
Date: Sat, 14 Jul 2018 21:01:38 +0800
Subject: [PATCH] [DeviceDriver][sfud] Fix block erase 0 byte issue when start
 address is equal end address.

---
 components/drivers/spi/spi_flash_sfud.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/components/drivers/spi/spi_flash_sfud.c b/components/drivers/spi/spi_flash_sfud.c
index 94b9afc9b..5d5da858f 100644
--- a/components/drivers/spi/spi_flash_sfud.c
+++ b/components/drivers/spi/spi_flash_sfud.c
@@ -76,6 +76,10 @@ static rt_err_t rt_sfud_control(rt_device_t dev, int cmd, void *args) {
             return -RT_ERROR;
         }
 
+        if (end_addr == start_addr) {
+            end_addr ++;
+        }
+
         phy_start_addr = start_addr * rtt_dev->geometry.bytes_per_sector;
         phy_size = (end_addr - start_addr) * rtt_dev->geometry.bytes_per_sector;